2 * Copyright 2007 Google Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 package com.google.zxing.qrcode.decoder;
19 import com.google.zxing.ReaderException;
20 import junit.framework.TestCase;
23 * @author srowen@google.com (Sean Owen)
25 public final class FormatInformationTestCase extends TestCase {
27 public void testBitsDiffering() {
28 assertEquals(0, FormatInformation.numBitsDiffering(1, 1));
29 assertEquals(1, FormatInformation.numBitsDiffering(0, 2));
30 assertEquals(2, FormatInformation.numBitsDiffering(1, 2));
31 assertEquals(32, FormatInformation.numBitsDiffering(-1, 0));
34 public void testDecode() throws ReaderException {
36 FormatInformation expected = FormatInformation.decodeFormatInformation(0x2BED ^ 0x5412);
37 assertEquals((byte) 0x07, expected.getDataMask());
38 assertEquals(ErrorCorrectionLevel.Q, expected.getErrorCorrectionLevel());
39 // where the code forgot the mask!
40 assertEquals(expected, FormatInformation.decodeFormatInformation(0x2BED));
42 // 1,2,3,4 bits difference
43 assertEquals(expected, FormatInformation.decodeFormatInformation(0x2BEF ^ 0x5412));
44 assertEquals(expected, FormatInformation.decodeFormatInformation(0x2BEE ^ 0x5412));
45 assertEquals(expected, FormatInformation.decodeFormatInformation(0x2BEA ^ 0x5412));
46 assertNull(FormatInformation.decodeFormatInformation(0x2BE2 ^ 0x5412));